## Oval bores - what's the equivalent round bore size?

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• Hi guys - thanks for all the help with my problem of the top note overblowing - I ve learnt loads, I ve cured it, and nearly overdosed on valium as I tried to
Message 1 of 3 , Feb 2, 2013
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Hi guys - thanks for all the help with my problem of the top note overblowing - I've learnt loads, I've cured it, and nearly overdosed on valium as I tried to follow Mike's and Edward's dialogue :-)

I'm just so happy that I've fixed it - sounds and plays lovely. I'd tuned it a little flat originally, planning to bring it into tune once it had 'settled', so I cut some off the foot and enlarged the playing-holes - now bang on, which shows that NAflutomat was right on, and it was my inexperience causing the problem.

If I make a flute with an oval bore, say using a 1" router bit and routing deeper so it ends up 1 1/8" high X 1" wide, what is the equivalent bore diameter - I need to know this so that I can enter a figure into NAFlutomat, which deals in circular bore-sizes (unless I'm missing a feature, which wouldn't surprise me!)

I'm assuming that NAFlutomat will still come up with 'correct' hole placements if I do this?

I've trawled the Net looking for a coversion calculator, to no avail - any help would be most appreciated.

Cheers,

Happy Steve
• A lot CAN go into calculating the area of an ellipse but that said.... for your flute purposes which is simple just take the Height + the Width and divide by 2
Message 2 of 3 , Feb 2, 2013
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A lot CAN go into calculating the area of an ellipse but that said....
for your flute purposes which is simple just take the Height + the
Width and divide by 2
so
1 1/8 + 1 = 2 1/8 / 2 = 1 1/16" is the relative diameter.
If you have to go oval I would suggest do it on the vertical axis
(which you did) - doing it on the horizontal seems to have a negative
tonal impact to my ears.

Barry WC

On Feb 2, 2013, at 5:21 PM, mockfordsteve wrote:

> Hi guys - thanks for all the help with my problem of the top note
> overblowing - I've learnt loads, I've cured it, and nearly overdosed
> on valium as I tried to follow Mike's and Edward's dialogue :-)
>
> I'm just so happy that I've fixed it - sounds and plays lovely. I'd
> tuned it a little flat originally, planning to bring it into tune
> once it had 'settled', so I cut some off the foot and enlarged the
> playing-holes - now bang on, which shows that NAflutomat was right
> on, and it was my inexperience causing the problem.
>
> If I make a flute with an oval bore, say using a 1" router bit and
> routing deeper so it ends up 1 1/8" high X 1" wide, what is the
> equivalent bore diameter - I need to know this so that I can enter a
> figure into NAFlutomat, which deals in circular bore-sizes (unless
> I'm missing a feature, which wouldn't surprise me!)
>
> I'm assuming that NAFlutomat will still come up with 'correct' hole
> placements if I do this?
>
> I've trawled the Net looking for a coversion calculator, to no avail
> - any help would be most appreciated.
>
> Cheers,
>
> Happy Steve
>
>

[Non-text portions of this message have been removed]
• Cheers Barry - as simple as that!
Message 3 of 3 , Feb 5, 2013
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Cheers Barry - as simple as that!

--- In nativeflutewoodworking@yahoogroups.com, Barry Higgins wrote:
>
> A lot CAN go into calculating the area of an ellipse but that said....
> for your flute purposes which is simple just take the Height + the
> Width and divide by 2
> so
> 1 1/8 + 1 = 2 1/8 / 2 = 1 1/16" is the relative diameter.
> If you have to go oval I would suggest do it on the vertical axis
> (which you did) - doing it on the horizontal seems to have a negative
> tonal impact to my ears.
>
> Barry WC
>
> On Feb 2, 2013, at 5:21 PM, mockfordsteve wrote:
>
> > Hi guys - thanks for all the help with my problem of the top note
> > overblowing - I've learnt loads, I've cured it, and nearly overdosed
> > on valium as I tried to follow Mike's and Edward's dialogue :-)
> >
> > I'm just so happy that I've fixed it - sounds and plays lovely. I'd
> > tuned it a little flat originally, planning to bring it into tune
> > once it had 'settled', so I cut some off the foot and enlarged the
> > playing-holes - now bang on, which shows that NAflutomat was right
> > on, and it was my inexperience causing the problem.
> >
> > If I make a flute with an oval bore, say using a 1" router bit and
> > routing deeper so it ends up 1 1/8" high X 1" wide, what is the
> > equivalent bore diameter - I need to know this so that I can enter a
> > figure into NAFlutomat, which deals in circular bore-sizes (unless
> > I'm missing a feature, which wouldn't surprise me!)
> >
> > I'm assuming that NAFlutomat will still come up with 'correct' hole
> > placements if I do this?
> >
> > I've trawled the Net looking for a coversion calculator, to no avail
> > - any help would be most appreciated.
> >
> > Cheers,
> >
> > Happy Steve
> >
> >
>
>
>
> [Non-text portions of this message have been removed]
>
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